<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="/js/vue.js"></script>
</head>

<body>
    <div id="app">
        <h2>当前计数器的值为：{{num}}</h2>
        <counter v-on:counter-add="num++"></counter>
    </div>
    <br>
    <script>
        Vue.component('counter',{
            template:'<button @click="">计数器</button>',
            methods:{
                add:function(){
                    this.Semit('counter-add')
                }
            }
        })
        let app = new Vue({
            el: "#app",
            data: {
                num:0
            },
            methods:{
                handleAdd:function(){
                    this.num++
                }
            }
        })
    </script>
</body>

</html